The charge of the electrical impulses sent from stimuli is extremely positive. Thus, the correct option is A. The net charge of such electrical impulses is positive because of the positively charged ions of the Na+.
<h3>What is an electrical impulse?</h3>
An electrical impulse may be defined as a nerve impulse that contains an electrical signal which travels throughout the body by the axon terminal.
In the resting potential state, the potential difference is -80mV, while after reaching the electrical impulse it changes to +40mV. This happens due to an electrical imbalance between sodium and potassium influx and efflux.
Therefore, the correct option is A.
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Ans.
Steroids are defined as active organic bio-molecules, having four rings with a specific molecular configuration. Steroids play role in two major functions: as hormones or signaling molecules and as structural components of plasma membrane.
Examples of steroid hormones are estrogen, progesterone, and cortisol. Thus, the correct answer is 'option b). they serve as chemical messengers.'
I have no clues tbh......
Hello! Your answer is A, blue is dominant to white.
A dominant gene means that it is always expressed if present, no matter what other genes there are. For example, if there is a dominant blue gene, and a recessive red gene, blue will be expressed.
In this case, we see that all three children are blue. This shows that blue is most likely dominant, and white is recessive.
Let's approach the other case, that white is dominant to blue. If white is dominant, then the blue smurf must have two blue recessive traits, and the white smurf would either have two white dominant traits, or one white and one blue trait. The only possible way the children can have a blue color is if the white smurf is heterozygous (meaning it has two different genes, in this case one blue and one white), and passes down the recessive gene three times. As you can see, this is very unlikely.
If white and blue are codominant, then the children would have a mixture of the two genes. (Most likely). This is not the case.
Therefore, your answer is A.
Hope this helps!
It is the recycling process by which the rocks are formed, broken down and reformed.
